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Wysocki" , , CC: , , , , , , , , Perry Yuan Subject: [PATCH 12/12] cpufreq: amd_pstate: update transition delay time to 1ms Date: Thu, 7 Jul 2022 13:01:29 -0400 Message-ID: <20220707170129.217086-1-Perry.Yuan@amd.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 9aff593b-f47a-44bf-5da9-08da603a5fdf X-MS-TrafficTypeDiagnostic: MN0PR12MB5788:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230016)(4636009)(376002)(136003)(346002)(396003)(39860400002)(40470700004)(36840700001)(46966006)(82310400005)(316002)(36860700001)(54906003)(40460700003)(110136005)(426003)(186003)(47076005)(36756003)(26005)(83380400001)(16526019)(34020700004)(336012)(7696005)(70206006)(4744005)(5660300002)(15650500001)(2906002)(8676002)(86362001)(1076003)(478600001)(70586007)(81166007)(4326008)(6666004)(41300700001)(40480700001)(82740400003)(2616005)(356005)(8936002)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jul 2022 17:01:45.7471 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9aff593b-f47a-44bf-5da9-08da603a5fdf X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT029.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN0PR12MB5788 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Update transition delay time to 1ms, in the AMD CPU autonomous mode and non-autonomous mode, CPPC firmware will decide frequency at 1ms timescale based on the workload utilization. Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 6d81a9a94dde..f16ad0b108e4 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -42,7 +42,7 @@ #include "amd-pstate-trace.h" #define AMD_PSTATE_TRANSITION_LATENCY 20000 -#define AMD_PSTATE_TRANSITION_DELAY 500 +#define AMD_PSTATE_TRANSITION_DELAY 1000 /* * TODO: We need more time to fine tune processors with shared memory solution